Frontend

Framework-agnostic brutalist web design system with Space Grotesk typography, purple/cyan/pink palette, bold offset shadows, and sharp borders. Use when building any web interface (HTML, React, Vue, Svelte, Astro, etc.) that needs neo-brutalist aesthetics with consistent design tokens, typography scale, and component patterns.

Creates and updates modular project rules for Claude Code in .claude/rules/ directory. Use when creating, updating, or modifying rule files, organizing project guidelines, setting up code standards, or when user mentions "create rules", "update rules", "add rules", or "rule configuration".

Chrome's built-in Prompt API implementation guide. Use Gemini Nano locally in browser for AI features - session management, multimodal input, structured output, streaming, Chrome Extensions. Reference for all Prompt API development.

Better Auth TypeScript/JavaScript authentication library. Use when implementing auth in Next.js, React, Express, or any TypeScript project. Covers email/password, OAuth, JWT, sessions, 2FA, magic links, social login with Next.js 16 proxy.ts patterns.

Building reusable React state machine skills with XState v5 and the actor model

Builds web applications with Vite including dev server, production builds, plugins, and configuration. Use when scaffolding projects, configuring build tools, optimizing bundles, or setting up development environments.

Expert guidance for leveraging Tailwind CSS V4's new Oxide engine, CSS-first configuration, and modern styling paradigms. This skill transforms Claude into a Tailwind V4 architecture specialist, capable of designing component systems, optimizing performance, and executing complex styling challenges with precision.

This skill should be used when working with xterm.js terminal implementations, React-based terminal applications, WebSocket terminal communication, or refactoring terminal-related code. It provides battle-tested patterns, common pitfalls, and debugging strategies learned from building production terminal applications.

Build and deploy this Next.js landing page application. Use when building, deploying, or preparing the project for production.

Enforce WCAG 2.2 accessibility standards. Use when creating UI components, reviewing frontend code, or when accessibility issues are detected. Covers semantic HTML, ARIA, keyboard navigation, and color contrast.

Professional PlantUML theme collection with 5 curated color schemes optimized for software requirement analysis and enterprise architecture diagrams. Each theme provides comprehensive styling with colors, fonts, and visual identity suitable for different business contexts.

Comprehensive AI development stack orchestrator for analyzing, recommending, and creating Claude Code components. Use when: (1) Planning a new project and need tech stack recommendations, (2) Analyzing existing project requirements to suggest agents/commands/hooks/settings/MCPs/skills, (3) Creating custom Claude Code components of ANY type, (4) Evaluating effectiveness of tech stacks before building, (5) Building installation command sequences from component selections, (6) User says "orchestrate", "tech stack", "what components do I need", "create agent/hook/command/setting/skill/mcp", "analyze this project", or "recommend tools". This skill combines the capabilities of skill-creator and mcp-builder into a unified orchestration layer for the entire Claude Code ecosystem.

This skill should be used when users want to sync content from text.md files to gallery project index.html files. Trigger phrases include "sync markdown", "sync text.md", "update gallery content", or when users provide a gallery index.html path for content refresh.

Automatically run the test suite when code changes are made to ensure all tests pass before proceeding. This skill runs pytest for backend projects and Playwright for frontend projects, and reports test results, coverage, and any failures.

Review HTML/CSS and React/TypeScript code for WCAG 2.1 Level AA accessibility compliance. Use when the user asks to review code for accessibility, check WCAG compliance, identify accessibility issues, or audit components/pages for a11y standards. Applicable for code reviews, component development, and accessibility testing.

Build reusable, composable UI components with single responsibilities, clear prop interfaces, proper state management, and minimal coupling. Use this skill when creating or editing React components (.tsx, .jsx files), when designing component APIs with props, when implementing component composition patterns, when managing local component state, when building shadcn/ui components, when creating shared UI components in resources/js/Components/, when implementing component documentation, or when refactoring large components into smaller, focused pieces.

This skill should be used when the user asks to "create an OpenCode tool", "build an OpenCode plugin", "write a custom tool for OpenCode", "use @opencode-ai/sdk", "use @opencode-ai/plugin", "integrate with OpenCode", "create OpenCode hooks", "define tool schema", "use tool.schema", "work with OpenCode sessions", or needs guidance on OpenCode SDK patterns, plugin development, or custom tool creation.

Build single-file HTML tools following Simon Willison's patterns - self-contained HTML+JS+CSS applications optimized for LLM generation, no build step, CDN dependencies. Use when creating browser-based tools, utilities, or demos that should be (1) Self-contained in one HTML file, (2) Easy to distribute and host statically, (3) Quick to prototype with LLMs, (4) Client-side only with no server requirements. Ideal for data visualization, API explorers, format converters, debugging tools, and interactive demos.

Install and configure the shadcn MCP server for Codex. Use when a user asks to enable shadcn/ui MCP tools, set up the shadcn MCP server in Codex, or troubleshoot shadcn MCP startup.

Use when you have a spec or requirements for a multi-step task, before touching code. Creates detailed implementation plans with bite-sized tasks.